Nutritional value of rapeseed expeller cake for broilers: effect of dry extrusion

Abstract

The effect of extrusion, applied in the production of cold-pressed rapeseed cake on its nutritional value for broilers was evaluated. Two experiments were performed on 55 female broiler chickens, kept individually and allocated to 2 groups of 14 birds (growth trial) or to 3 groups of 9 chickens (digestibility trial). Rapeseed cakes pressed once (RC) or extruded and pressed again (RCE) were mixed in a 6:4 proportion with a basal diet and used in a balance trial with 3-week-old chickens. Furthermore, they were included into wheat-soyabean meal diets at a level of 100 or 150 g/kg and fed during 1-3 and 4-6 weeks of age, respectively, in a growth trial.Due to extrusion and additional pressing, the amount of crude fat decreased from17.4% in RC to 10% in REC, fat digestibility increased from 83 to 91% (P<0.01), protein digestibility decreased from 79 to 76% (P<0.01), and the metabolizable energy value decreased from 13.8 to 11.4 MJ/kg DM (P<0.01). Broilers ate more of the REC diet compared with the RC diet and their final body weight gain was higher (2.61 vs 2.39 kg; P<0.05). This, as well as a lower relative mass of the liver (P<0.05) and kidneys (P<0.01) and a slightly lower mass of thyroids, indicates that extrusion resulted in partial inactivation of the antinutritional factors present in rape seeds.

Egg performance, egg quality, and nutrient utilization in laying hens fed diets with different levels of rapeseed expeller cake

“…The chemical composition of the rapeseed expeller cake being studied (Table 1) was similar to the composition of other RCs obtained using the same technique and previously reported by Schöne et al (1997Schöne et al ( , 2002 and Smulikowska et al (2006). The mean laying rate, across all dietary treatments, and the entire experimental period (between 28-53 wks of hen age) was 94.6%; egg weight, 59.6 g; daily egg production, 56.4 g/hen; daily feed consumption, 116 g/hen and feed conversion per 1 g of eggs, 2.06 g ( Table 3).…”

“…In diets with 0, 4, 6 and 8% RC, N balances and metabolizability of energy behaved similarly (p > 0.05). For comparison, in an experiment with broiler chickens, Smulikowska et al (2006) found the relative N retention (as % of N intake) to be 44.7%, and content of AME N in gross energy of rapeseed cake to be 55.1% (Smulikowska et al 2006).…”

“…The content of anti-nutritive factors, such as glucosinolate and erucic acid, in rapeseed, has been reduced during the last 20 years by plant breeding programmes, so the risk in the use of rapeseed products as animal feed has too been reduced. The results of previous experiments have demonstrated that RC can be used as a feed component in the diets of broiler chickens (Suchy et al 2002, Peter and Dänicke 2003, Smulikowska et al 2006, pigs (Schöne et al 1997, Schöne et al 2002 and ruminants (Göpfert et al 2006). The effects of untreated or extruded rapeseed and extracted rapeseed meal on performance indices and egg quality in layers have been studied (Kamińska 2003, Lichovnikova and Zeman 2004, Lichovnikova et al 2008, but data on the use of rapeseed expeller cake as a feed component for hens are very limited.…”

Effect of Using Extruded Full-Fat Soybean on Performance and Carcass Characteristics in Female Turkeys

“…Feed consumption: Amount of feed consumption on turkeys in starter, finisher periods (Table 5) and the whole period in experimental groups with different levels of the extruded full-fat soybean (EFFSB) were decrease than control group but this difference was insignificant (p>0.05). The findings of the present study are in conformity with the findings of the previous research works (Marsman et al, 1997;Nalle et al, 2011) but at the same time they were not in conformity with the findings of the researchers who witnessed increased intake of EFFSB (Smulikowska et al, 2006). This might be due to an underestimation of the energy content of the beans used and was probably due to the fact that the energy value available to the bird as a result of rolling and extrusion, coupled with pelleting of the diets, was underestimated.…”

Effect of an organic acid blend and phytase added to a rapeseed cake-containing diet on performance, intestinal morphology, caecal microflora activity and thyroid status of broiler chickens

“…Rapeseed cake was pressed on a screw press expeller, extruded and pressed again. The chemical composition of the rapeseed cake was described previously (Smulikowska et al., 2006a). The cake contained 21 μmol alkenyl glucosinolates per g (25 μmol/g fat‐free DM).…”